Deceleration closed-loop control urban rail vehicle braking system and method

Abstract

The invention discloses a deceleration closed-loop control urban rail vehicle braking system and method. The system comprises a braking control unit, the braking control unit is connected with a basic braking device, the basic braking device comprises a brake pad, a brake disc and a pressure sensor, and the brake pad is used for being attached to the brake disc to generate pressing force, and generating braking deceleration based on the pressing force; and the pressure sensor is used for monitoring the pressing force in real time by the braking control unit. By means of the urban rail vehicle braking system, the braking deceleration and the pressing force generated by the braking system can be monitored and controlled, and the urban rail braking system scheme of deceleration closed-loop control is formed.

Description

technical field [0001] The present application relates to the technical field of rail vehicle braking systems. More specifically, the present invention relates to a deceleration closed-loop control urban rail vehicle braking system and method. Background technique [0002] In the traditional urban rail transit vehicle braking system, the generally used urban rail braking system will obtain control commands (braking force level, braking command) from the controller or signal system through the vehicle network control system (TCMS). , traction command, etc.). The braking control unit in the braking system receives the control commands issued by the network to realize the application and release of the braking force. [0003] At present, after the traditional urban rail braking system calculates the air braking force that the system needs to apply, it performs closed-loop control on the compressed air in the brake cylinder, and the basic braking device converts the brake cyli...

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Problems solved by technology

[0004] 1. There is a problem with the transmission efficiency of the basic braking device when it is working, that is, the relationship between the air pressure in the brake cylinder and the pressing force determined during the design process of the basic braking device is different from the actual work, which is to a large extent It affects the braking deceleration control accuracy of the braking system;

[0005] 2. After the braking system completes the brake cylinder pressure control, it does not detect the actual deceleration of the train, so it cannot be adjusted in time when the actual deceleration deviates;

[0006] 3. The basic brake device is a purely mechanical structure. Although theoretically after the design of the basic brake device is completed, the pressure of the brake cylinder and the pressing force applied to the brake disc form a fixed proportional relationship, but when the basic brake device appears The above proportional relationship is abnormal due to a fault, and even when the braking force is lost, since the brake control unit only detects and controls the pressure of the brake cylinder, it cannot adjust the pressure of the brake cylinder in time, and cannot monitor the health status of the basic brake device. judge;

[0007] 4. The traditional urban rail braking system only controls the closed-loop pressure of the brake cylinder. It is impossible to judge whether the actual braking effect of the train produced by the brake cylinder pressure through the basic braking device is up to standard. Therefore, after the brake system is installed on the train , requires a large number of test verifications and brake cylinder pressure adjustments under different load conditions, which is time-consuming and labor-intensive

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